This Michelin AirStop inner tube is sized for 450x32/35A and 18x1 3/8 tyres. It matches ETRTO 32/37-390/400, a fitment commonly found on older small-wheel bicycles and selected classic utility bikes.
Confirm both markings before installation: the tyre should be 32 to 37 mm wide and use a 390 or 400 mm bead-seat diameter. The 32 mm Presta valve suits rims drilled for the narrower valve type.
| Type | Inner tube |
|---|---|
| Brand | Michelin |
| Range | AirStop |
| Tyre size | 450x32/35A / 18x1 3/8 |
| ETRTO range | 32/37-390/400 |
| Valve | Presta 32 mm |